Bridling apparatus



Nov. 20, 1923 llA-l l J. G. BIN ET AL BRIDLING APPARATUS Filed April l241922 4 Sheets-Sheer L Nov. zo, 1923 3,474,755

J. G. BAIN ET AL BRIDLI NG APPARATUS Filed April 12, 1922 4 Sheets-Sheet2 C. I E

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Nov. 20, i923 LQYMS J. G. BAIN ET AL BRIDLING APPARATUS Filed April 12,1922 4 Sheets-Sheet 4 FEE.

Fatented Nov. 20, i923.

UNET@ STATES JOSEPH G. BAIN, 0F PITTSBURGH, AND LASZL M. STEMPEL, OFDORMONT, PENNSYL- VANIA, ASSIGNORS TO LEWS FONDRY 85 MACHINE COMPANY, OFPITTSBURGH, PENNSYLVANTA,A CORPORATIN 0F PENNSYLVANIA. 1

BRIDLING APPARATUS.

Application led April 12, 1922. Serial No. 551,767.

To all whom t may concern:

Be it known that We, JOSEPH G: BAIN and LAsZLo M. STEMPEL, both citizensof the United States, residing, respectively, at

Pit'tsburgln in the county of Allegheny and State of Pennsylvania, andDormont, in the county of Allegheny and State of Pennsylvania, haveinvented a new and use ful Improvement in a Bridling Apparatus, of whichthe following is a speciication.

This invention relates to a bridling apparatus for use in conjunctionwith rolling mills.

A general objectof the invention is lo provide bridling apparatus whichis simple and compact, and which avoids the ditiicult and laboriousoperation of threadinga strip being passed to reducing rolls throughstationary bridle bars.

A more specific object of the invention is to provide bridling apparatusof the nature noted above which places the. strip being rolled under atension which maybe regulated in accordance with the thickness of thestrip and the material of which it is composed.

A further specific object of the invention is to provide bridlingapparatus which places the strip under a tension sufficient forsatisfactory rolling thereof without producing a rubbing of the stripagainst itself or any other metal.

It is also common practice to roll out metal wires of round orrectangular cross section, and ofvarying cross sectional area intoribbons. Tt is desirable that such material, equally with strips besubjected to tension while being passed through the reducing rolls. Inthe art it is customary to include such forms, as well as the flat formscalled strips hereinabove, under the general term of bars A stillfurther object of the invention is, therefore, to provide bridlingapparatus embodying the advantages mentioned above which may be arrangedor readily adapted for use withbars of round or rectangular crosssection as Well as with the flat bars more speciicallycalled strips.

In the accompanying drawings Figure 1 is a side elevation showing theapparatus of the present Vinvention secured in position on the housingof a rolling mill; Figure 2 is a front elevation of the apparatus;Figure 3 is a cross section therethrough showing the elements of theappara-tus in operative position; JUigure fl is a plan view of theapparatus; Figure 5 is a plan view of a modified form of the devicewhich is adapted particularly for the bridling of bars which arecircular or rectangular in cross section; and Figure 6 is a frontelevation lof such modified form of the device. The apparatus of thepresent invention comprises primarily side frame members or arms l and2, which are secured to the housing 3 of the rolling mill; stationarybridle bars 4 and 5 mounted in the side arms l and 2; and a movablemember or bar 6 arranged to be swung between the stationary bars acrossthe plane of the axes thereof.

Tt is to be understood that the general object of bridling thin stripsof metal passingto a rolling mill is to prevent buckling, curling, orwarping of such strips. This objectmay be effected by stationary bridlebars or by suitable automatic bridling apparatus which place the stripbeing rolled under tension, offering resistance against the pull of therolls. Some automatic means effect such bridling by wrapping the stripupon itself so that a frictional drag is produced between differentportions of the same strip during passage of the strip to the reducingrolls of the mill. Thile this method of placingl the strip under tensionis satisfactory when the strip is composed of certain meta-ls, it isunsatisfactory if the strip is composed of certain other metals, and isnotably so in the case of aluminum.

The device of the present invention deiiects and grips a strip passingto the rolls wit-hout producing` a frictional drag of the strip uponitself; of dragging the strip over any other metallic surface when suchis.

composed of aluminum.

As shown clearly in Figure 3 of the drawings, the strip 7 which is beingrolled lies initially wholly on one side of both the stationary bars 4and 5 in its passage to the rolls, the strip being shown as lying abovethese bars. Tn order to deflect the strip. the movable member or bar 6is provided. This movable member or bar 6 is carried by bracket arms S.which are rigidly secured to the trunnions 9 of stationary bar iinwardly of the side members 1 and 2 of the apparatus. It will thus beseen that the bar 6 revolves about a fixed axis, and that it describesthe arc of a circle when swung.

In order te rotate bar 4, and swing movable bar 6, an operating handle10 is rigidl1 secured `to the outer extremity of the trunnion 9 whichextends beyond the side traine member 1 of the apparatus. Movement of Ythe operating handle 10 serves to swing Vthe bar 6 from the positionshown in Figuresl and 2V of the drawings into the position shown inFigure 3 thereof. The bar may be locked in either et these positions bymeans of a spring pressed locking pin 11 which is arranged to enternotches 12in a locking plate 13 secured to the side trame 2 of theapparatus. A

As the bar 6 swings downward, describing the are ot aV circle, itdeiiects the strip 7 downward with it and brings the strip into contactwith a pair ot contact rolls 14 which are rotatably mounted in bearingblocksl 15 in the side members 1 and 2 ot' the apparatus. The strip 7thus gripped between the swinging bar G and the contact rolls 14 so thatit is held under tension thereby and resistance to the pull ot' thereducing rolls.

It' aluminum strips are being rolled the stationary bars 4 and 5, theswinging bar 6, and the Contact bars or rolls 14 are all preferablyprovided with a fibre covering 16, so thatthe strip is not dragged incontact with any metallic suriace in its passage to the rolls oit therolling mill. The fibre o r- :telt covers 16 on the bars may be onrittedior the rolling oi strips of brass, copper, steel, or in general anymetal other than aluminum or other metals the suriaces oit which aresubject to injury by being dragged over a `metallic surface. l

It will be observed that the length ot the are described is limited, twodetinite positions only being provided ioi'. For this reason it isnecessary that the contact bars or rolls 14 be vertically iuljustable.in order that the strip may be gripped with the desired firmness, and inorder that the apparatus may accomn'iodate itselt' to strips ot': dili--iterent thickness. For this purpose the bearing blocks 1 5 are slidablymounted tor limited vertical movement in the side inembers 1 and 2, andare provided with seats 17 for receiving a stiff hat spring 18. `Againstthis flat spring 18 bears a screw threaded plunger 19` which has a Screwthreaded engagement in a bracket 2O secured to the side members of theapparatus, and which is provided with an operating handle 21.

The bearing blocks 15 arelprovided with rounded lower Jraces which restupon the fiat .Spring 18 and provide the Seat ,1.7 therefor. Because ofthis, the bearing blocks 15 have a rocking mounting on the spring, andthe contact rolls or bars 14 are self adjusting so that they both bearequally at all times upon the strip 7 gripped between them and the bart3, to exert an equal pressure thereon.

In use ot the apparatus, the strip 7 is passed over thestationaryb-ridle bars 4 and 5 and gripped by the rolls et' the mill.The movable bar 6 is then swung across the plane ot' the axes ot' thestationary bridle bars into its lower position, and the contact rolls 14are adjusted to grip the strip firmly and hold it under tension againstlthe pull of the reducing rolls.

It' a number of strips ot uni'toriii thickness are being rolled, asingle adjustment of Vthe contact Vrollsserres throughout the bridliiigand rolling. oi all of such strips. ln such case the only operationsnecessary in tensioning the strips consist in swinging the movable barupwardly to permit a strip to be led over `the stationary bridle barstot-he rolls of the rolling mill, and in swinging the movable bardownwardly'to press the strip against Ithe contact members. t Y

The toi-m of the apparatus illustrated in `Figures 5 and 6 ot thedrawings is adapted particularly for use in the bridling oit bars ot'circular or rectangular' cross section. F91' this purpose the apparatusshown in the preceding figures of the drawings may simply be providedwith bridle bars which have therein semi-circular or rectangular groovesfor receiving a bar passing to the reducing rolls. Y

As shown in these ligures et the drawings,

however, the apparatus is contracted andV comprises a spring 18 andbracket 20` shorter than the spring 1S and bracket 20, and bridle bars4, 5, Ga, and 14a of lesser length than the corresponding bridle barsdesigned :tor the bridling oi flat bars, or Y The device described isnot only simple in construction and economic-al to manufacture. but alsoprovides bridling means and operation or Which is ot extreme sinplicity.

llOV

The advantages ot the device as hereinabove4 set forth, together withnumerous other advantages, will be readily appreciated by -those skilledin the `art toE which the invention pertains. l Y i As the deviceillustrated and described is, moreover. susceptible ot a numberofmodilications without departing from the spirit of the linventionembodied therein, the scope of the invention is to be restricted only bythe limitation-S'contained in the claims appended hereto. v

What I claim is:

l. In bridling apparatus Vfor use in conjunction with rolling mills thecombination of a plurality of stationary bridle bars, and a movablemember pivotally mounted on one or said bars and arranged to be swungacross the plane ol; the axes ot said stationary bars.

2. In bridling apparatus for use in conjunction with rolling` mills thecombination ot a pluralty olf stationary bridle bars, contact meansdisposed to one side of the plane of tlie axes of said bridle bars, anda. pivotally mounted member arranOed to be swung` across said plane intoproximity to said contact means.

3. In bridling` apparatus for use in conjunction with rolling mills thecombination ot' a plurality of stationary bridle bars, contact meansdisposed to one side of the plane ot the axes of said bridle bars, and amember pivotally mounted onone of said bridle bars and arranged to beswung across said plane into proximity to said contact means.

Ll. In bridling` apparatus for use in conV` junction with rolling millsthe combination ot' a. plurality of stationary bridle bars, contactmeans disposed to one side of the plane ot the axes of said bridle bars,and a member arranged to be moved across the plane of the axes oli saidbars into proximity to said contact means.

5. In bridling apparatus for use in con junction with rolling mills thecombination ot a. plurality of stationary bridle bars, contact rollsdisposed to one side ot the plane oit the axes of said bridle bars, anda pivotally mounted member arranged to be swung across said plane intoproximity to said contact rolls.

t3. In bridling apparatus for use in conjunction witli rolling mills thecombination of a plurality of stationary bridle bars, conl tact rollsdisposed to one side of the plane of the axes of said bridle bars, and amember pivotally mounted on one of said bridle Vbars and arranged to beswung` across said plane into proximity to said Contact rolls. 7. Inbridling apparatus for use in conjunction with rolling` mills thecombination of a plurality ot stationary bridle bars, contact rollsdisposed to one side of the plane ot the axes of said bridle bars, and amember arranged to be moved across the plane of the axes of said bridlebars into proximity to said contact rolls.

8. In bridling apparatus for use in conjunction with rollingmills thecombination ot a plurality of stationary bridle bars, contact meansdisposed to one side of the plane of the axes ot said bridle bars, apivotally mounted member arranged to be swung across said plane intoproximity to said contact means, and means for locking said niember inlsuch position.

9. In bridling apparatus ior use in conjunction with rolling mills thecombination of a plurality of stationary bridle bars, contact'meansdisposed to one side oi.'A the plane of the axes of said bridle bars, amember pivotally mounted on one ot said bridle bars and arranged to beswung across said plane into proximity to said. contact means, and meansfor locking said member in such position.

l0. In bridling apparatus for use in conjunction with rolling mills thecombination of a plurality of'stationary bridle bars, contact meansdisposed to one side ot the plane of the axes of said bridle bars, amember arranged to be moved across the plane of the axes of the bridlebars into proximity to said contact means, and meansl tor locking saidmember in such position.

ll. In bridling apparatus for use in conjunction with rolling mills thecombination of a plurality of stationary bridle bars, contact rollsdisposed to one side ot the plane of the axes ot' said bridle bars, apivotally mounted member arranged to be swung across said plane intoproximity to said contact rolls, and means for locking said member insuch position.

l2. In bridling apparatus for use in conjunction with rolling` mills thecombination of a plurality of stationary bridle bars, contact rollsdisposed to one side of the pla-ne o' the axes of said bridle bars, amember pivot- Vally mounted on one ot said bridle bars and arranged tobe swung across said plane into proximity to said contact rolls, andmeans for locking said member in such position.

13. In bridling apparatus tor use in conjunction with rolling mills thecombination of a plurality of stationary bridle bars, contact rollsdisposed to one side of the plane of the axes of said bridle bars. amember arranged to be moved across the plane of the axes of said barsinto proximity to said contact rolls, and means for locking` said men*-ber in such position.

14e. In bridling apparatus for use in conjunction with rolling mills thecombination of a plurality of stationary bridle bars, verticallyadjustable contact means disposed to one side of the plane of the axesof said bridle bars, and a pivotally mounted member arranged to be swungacross said plane into proximity to said contact means.

l5. In bridling apparatus for use in conjunction with rolling'mills thecombination of a plurality of stationary bridle bars, verticallyadjustable contact means disposed to one side of the plane of the axesof said bridle bars, and a member pivotally mounted on one of saidbridle bars and arranged, to be swung across said plane inloV bars `:mdintoV proximityV to said Contact 10 proximity to said Contact means. ymeans.

16. n bi'idling; apparatnsfl'or use in Con- VInesl'imony Whereowehereunto set oml j unotion with rolling mills .tbe combination V-lizlndsY of@ Vplurality of stationary bridle bars, Y JOSEPH (gr. BAN; Y.vertically adjustable Contact means disposed LASZLO M'. VSTElfI'PL. to.one side of the plane of the axes of said lVil'nesses: bridle bars, andmember arranged to be WV. E. BALL-mm moved across The plaine of the axesof said E. B. WMJiERsp Y

